# 两个 3 行 3 列的矩阵，实现其对应位置的数据相加，并返回一个新矩阵：
"""
X = [[12,7,3],
    [4 ,5,6],
    [7 ,8,9]]

Y = [[5,8,1],
    [6,7,3],
    [4,5,9]]
"""

X = [[12, 7, 3],
     [4, 5, 6],
     [7, 8, 9]]

Y = [[5, 8, 1],
     [6, 7, 3],
     [4, 5, 9]]

# 先要把Z的结构写出来,不然下面添加的时候就会报错
Z = [[0, 0, 0],
     [0, 0, 0],
     [0, 0, 0]]
for i in range(3):
    for j in range(3):
        Z[i][j] = X[i][j] + Y[i][j]
print(Z)
